NACE CP2 – Exam Questions and
Answers | Latest Version | 2025/2026 |
Correct & Verified
Which primary purpose does a protective coating serve on steel structures?
A) Improve electrical conductivity
B) Increase structural load capacity
C) Isolate metal from corrosive environments
D) Change metal composition
✔✔C) Isolate metal from corrosive environments
What is corrosion most commonly defined as?
A) Mechanical failure of metal
B) Chemical or electrochemical deterioration of materials
C) Thermal expansion damage
D) Physical abrasion
✔✔B) Chemical or electrochemical deterioration of materials
Which environmental factor most accelerates corrosion of carbon steel?
A) Dry air
B) Low temperature
C) Presence of moisture and oxygen
D) Ultraviolet radiation
1
,✔✔C) Presence of moisture and oxygen
Which surface preparation method removes mill scale and rust most effectively?
A) Solvent cleaning
B) Hand tool cleaning
C) Power tool cleaning
D) Abrasive blast cleaning
✔✔D) Abrasive blast cleaning
What does SSPC-SP 10 represent?
A) Near-white metal blast cleaning
B) White metal blast cleaning
C) Commercial blast cleaning
D) Power tool cleaning
✔✔A) Near-white metal blast cleaning
Which contaminant most commonly causes coating adhesion failure?
A) Properly cured primer
B) Residual oil and grease
C) Clean dry steel
D) Uniform surface profile
✔✔B) Residual oil and grease
2
,What is the primary role of a primer coating?
A) Provide decorative color
B) Improve UV resistance
C) Promote adhesion and corrosion protection
D) Increase coating thickness only
✔✔C) Promote adhesion and corrosion protection
Which coating property allows it to stretch without cracking?
A) Hardness
B) Brittleness
C) Flexibility
D) Solubility
✔✔C) Flexibility
What is surface profile?
A) Thickness of the coating
B) Pattern of peaks and valleys on the substrate
C) Chemical composition of steel
D) Level of surface cleanliness
✔✔B) Pattern of peaks and valleys on the substrate
Which instrument measures surface profile?
A) Wet film gauge
3
, B) Dry film thickness gauge
C) Replica tape or profile gauge
D) Hygrometer
✔✔C) Replica tape or profile gauge
Which factor most affects coating curing time?
A) Color of coating
B) Ambient temperature
C) Substrate thickness
D) Abrasive type
✔✔B) Ambient temperature
What does DFT stand for in coatings inspection?
A) Direct Film Treatment
B) Dry Film Thickness
C) Dual Function Test
D) Density Factor Total
✔✔B) Dry Film Thickness
Which gauge is used to measure dry film thickness on steel?
A) Micrometer
B) Magnetic pull-off gauge
C) Hygrometer
4
Answers | Latest Version | 2025/2026 |
Correct & Verified
Which primary purpose does a protective coating serve on steel structures?
A) Improve electrical conductivity
B) Increase structural load capacity
C) Isolate metal from corrosive environments
D) Change metal composition
✔✔C) Isolate metal from corrosive environments
What is corrosion most commonly defined as?
A) Mechanical failure of metal
B) Chemical or electrochemical deterioration of materials
C) Thermal expansion damage
D) Physical abrasion
✔✔B) Chemical or electrochemical deterioration of materials
Which environmental factor most accelerates corrosion of carbon steel?
A) Dry air
B) Low temperature
C) Presence of moisture and oxygen
D) Ultraviolet radiation
1
,✔✔C) Presence of moisture and oxygen
Which surface preparation method removes mill scale and rust most effectively?
A) Solvent cleaning
B) Hand tool cleaning
C) Power tool cleaning
D) Abrasive blast cleaning
✔✔D) Abrasive blast cleaning
What does SSPC-SP 10 represent?
A) Near-white metal blast cleaning
B) White metal blast cleaning
C) Commercial blast cleaning
D) Power tool cleaning
✔✔A) Near-white metal blast cleaning
Which contaminant most commonly causes coating adhesion failure?
A) Properly cured primer
B) Residual oil and grease
C) Clean dry steel
D) Uniform surface profile
✔✔B) Residual oil and grease
2
,What is the primary role of a primer coating?
A) Provide decorative color
B) Improve UV resistance
C) Promote adhesion and corrosion protection
D) Increase coating thickness only
✔✔C) Promote adhesion and corrosion protection
Which coating property allows it to stretch without cracking?
A) Hardness
B) Brittleness
C) Flexibility
D) Solubility
✔✔C) Flexibility
What is surface profile?
A) Thickness of the coating
B) Pattern of peaks and valleys on the substrate
C) Chemical composition of steel
D) Level of surface cleanliness
✔✔B) Pattern of peaks and valleys on the substrate
Which instrument measures surface profile?
A) Wet film gauge
3
, B) Dry film thickness gauge
C) Replica tape or profile gauge
D) Hygrometer
✔✔C) Replica tape or profile gauge
Which factor most affects coating curing time?
A) Color of coating
B) Ambient temperature
C) Substrate thickness
D) Abrasive type
✔✔B) Ambient temperature
What does DFT stand for in coatings inspection?
A) Direct Film Treatment
B) Dry Film Thickness
C) Dual Function Test
D) Density Factor Total
✔✔B) Dry Film Thickness
Which gauge is used to measure dry film thickness on steel?
A) Micrometer
B) Magnetic pull-off gauge
C) Hygrometer
4
